Specification: Aluminium material ensures that it is durable. 50mm air filter interface cup is for 24/26/28/30mm motorcycle carburetor. This empty filter can efficiently increase the air intake and increase the power.   Item Name: Air Filter Interface Cup Material: Aluminium Suit: for PWK 24/26/28/30mm, for PE 28mm Features: Easy Installation, Increase Air Intake, Carburetor Accessory Width: 9.0cm/3.54" (Approx.) Installation Diameter: 50mm/1.97" (Approx.) Height: 33mm/1.30" (Approx.)   Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Includes: (Carburetor Not Included) 1 x Air Filter Interface Cup 3 x Screws